Expression of carcinoembryonic antigen in primary tumors and peritoneal metastases of gastric carcinoma / 国际外科学杂志

ABSTRACT

Objective To further explore the relationship of CEA in gastric cancer tissue expression and serum levels,and seek after the prediction effect of serum CEA in the peritoneal metastasis.Methods Retrospective analysis of 38 gastric cancer patients with peritoneal metastasis (group A) and 60 gastric cancer patients without peritoneal mnetastasis (group B),and analyze the first time in two groups of patients with preoperative serum CEA levels.The expression levels of CEA was examined by Immunohistochemistry method in primary tumors、negative margin and peritoneal metastases foci from group A and in primary tumors from group A,and the detection result of the statistical was analyzed.Results The expression of the first preoperative CEA serum levels in group A and group B was 73.68％ and 41.67％ respectively (x2 =9.604,P =0.002),and the two groups of patients with the first preoperative CEA serum levels was (74.00 + 6.00) ng/mL,(46.06 + 9.03) ng/mL,The two groups was statistically significant (t =4.715,P ＜0.01).In group A,the expression of CEA of primary tumors was higher than that of negative margins (x2 =29.587,P =0.000);the difference expression of CEA positive degree in gastric cancer primary tumors and negative margins was statistically significant(Z =-5.348,P =0.000).In peritoneal metastases foci the expression of CEA was 92.11％,that was 64.82％ in primary tumor(x2 =6.728,P =0.009);the difference expression of CEA positive degree in peritoneal metastases foci and primary tumors was statistically significant (Z =-5.397,P =0.017).In primary tumors,the expression of CEA in group A and group B was 68.42％ and 42.67％ respectively (x2 =4.450,P =0.035),the two groups of patients with the difference expression of CEA positive degree was statistically significant,the two groups was statistically significant(Z =-2.227,P =0.026).Conclusion Over expression of CEA might have a critical role in peritoneal metastases of gastric carcinoma.The differences of the expression of CEA in gastric cancer in different tissues may indicate the risk of gastric cancer peritoneal metastasis.